Colletes speculiferus Cockerell, 1927:15, ♂♀. Holotype ♂, North Japan, 1910 (American Museum); Kuhlmann & Ascher, 2010Kuhlmann, M. & J.S. Ascher 2010. Two new synonymies of eastern North American Colletes Latr. species described from Japan (Hymenoptera: Colletidae). Entomological News 121 (4):325-328.:326, Holotype ♂ (AMNH). - Kuhlmann & Ascher, 2010Kuhlmann, M. & J.S. Ascher 2010. Two new synonymies of eastern North American Colletes Latr. species described from Japan (Hymenoptera: Colletidae). Entomological News 121 (4):325-328. (distribution); Hall et al., 2016Hall, H.G., D.T. Almquist & J.S. Asher 2016. A new species of Colletes (Hymenoptera: Apoidea: Colletidae) from northern Florida and Georgia, with notes on the Colletes of those states. Journal of Melittology 58:1-20. (distribution).
Colletes mitchelli Stephen, 1954:325, ♂♀. Holotype ♂, Virginia Beach, Virginia, September 30, 1932 (United States National Museum, leg. Fred Knab). Synonymized with Colletes speculiferus Cockerell, 1927 by Kuhlmann & Ascher, 2010Kuhlmann, M. & J.S. Ascher 2010. Two new synonymies of eastern North American Colletes Latr. species described from Japan (Hymenoptera: Colletidae). Entomological News 121 (4):325-328.:326. - Stephen, 1954Stephen, W.P. 1954. A revision of the bee genus Colletes in America north of Mexico (Hymenoptera, Colletidae). University of Kansas Science Bulletin 36:149-527. (distribution); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538. (distribution); Pascarella, 2006Pascarella, J.B. 2006. The bees of Florida. . (distribution).